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Avances en Odontoestomatología
versão On-line ISSN 2340-3152versão impressa ISSN 0213-1285
Resumo
MATOS GARRIDO, N et al. Influence of the cyclic fatigue in the implant-abutment internal connections. Av Odontoestomatol [online]. 2017, vol.33, n.5, pp.221-229. ISSN 2340-3152.
Introduction:
The connection implant-abutment has been suggested to be crucial for the long-term success of osseointegration and to prevent future complications. The aim of this study was to evaluate the influence of fatigue cyclic test in the behavior of internal connection implant-abutment.
Methods:
Fifty titanium implants with internal connections were divided in 3 groups: octogonal connection (OC); double hexagonal connection (DHC); and hexagonal connection (HC) and with their respective abutments. Abutments were tightened to 30 Ncm with a torque controller. A cyclic load between 550 N and 135N according to different implant systems at a 30-degree angle to the long axis was applied to the implants for a 5 million cycles.
Results:
Biomechanical testing showed implant fracture in a limit load of 325 N of OC implants; in 150 N of DHC implants and 135 N of HC implants. Fracture cracks were located in the area between neck and body of implants. No abutments and screws retention fractures were found.
Conclusions:
Results of this study indicate that fatigue cyclic tests are important to evaluate the biomechanical behavior of different connection implants-abutments of several implants systems.
Palavras-chave : Dental implants; cyclic loading; fatigue test; biomechanics; implant-abutment connection; implant dentistry.